It's not choosing the lowest frequency. Lionel just chose that as a random example from your xrandr.txt. That same file shows the current mode is:
2560x1440 (0xbb) 241.500MHz +HSync +VSync *current +preferred -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1892296 Title: gnome-control-center cannot change resolution of external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1892296/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
